The old professor asked us ______ we read books in our spare time

He must have known the truth yesterday, _________?

ouldn’t remember the exact date of thetyphoon, but he knew it was _____ Sunday, because everybody was at _____church

Many streets in this city have been ________ for cultural protection. [ ]

After knocking down the old man, the inhuman driver left the accident scene in a hurry, the law to punish him.